DVD Entertainment System

have an 05 Quest - SL Model w/ sky panels and roof rack for dual DVDs. I did not/do not have the 'actual' DVD screens in...yet....I'd like to have them installed. The dealer 'sends' the vehicle out to have them installed. Does anyone here know what company they may use? I am located in Pennsylvania. I am trying to cut out the middle man...if ya know what I mean. If anyone can help I'd appreciate hearing from you!